----

----

|                                                           |                                 |
|----------------------------------------------------------------|--------------------------------------|
| West Virginia                                                  | 20-2088726                           |
| (State or other jurisdiction of incorporation or organization) | (I.R.S. Employer Identification No.) |
|                                                           |                                 |

| Title of Each Class           |
|-------------------------------|
| Limited Partnership Interests |

| Large accelerated filer      o           | Accelerated filer                     o |
|------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------|
|                                                                   |                                                                                                                                             |
| Non-accelerated filer        o | Smaller reporting company     x                                                                                         |

----

----

----

|   | (1) | The Partnership is revising the Original Form 10-K to include in this Amendment Item 9A(T)(b), Management’s Report on Internal Control Over Financial Reporting, which includes the Managing General Partner’s statement that the Partnership’s internal control over financial reporting was effective at December 31, 2009. Additionally, related disclosures that identify the framework used by the Managing General Partner to so evaluate the effectiveness of the Partnership’s internal controls, have been included in this Amendment.  This report was inadvertently omitted from the Original Form 10-K. |
|--------|-----|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (2) | The Partnership is filing a revised reserve report of the Partnership’s third-party petroleum engineering firm.  The report of Ryder Scott Company, L.P. (“Ryder Scott”) as of December 31, 2009 was included as Exhibit 99.2 to the Original Form 10-K.  The original report did not include the average price used in the annual reserves calculation and included a statement limiting the use of the report to PDC 2005-B Limited Partnership.  The report of Ryder Scott included as the Amendment’s Exhibit 99.2, now includes the average price used in the annual reserve calculation and does not contain any language limitation on the use of the report. |
|--------|-----|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (3) | New certifications on behalf of the Partnership by the Managing General Partner’s Chief Executive Officer and Chief Financial Officer are being filed as exhibits to this Amendment No. 1 on Form 10-K/A under Part IV, Item 15, Exhibits. |
|--------|-----|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

|   | (1) | Pertain to the maintenance of records that in reasonable detail accurately and fairly reflect the transactions and dispositions of the assets of the issuer; |
|--------|-----|--------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (2) | Provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with accounting principles generally accepted in the United States of America and that receipts and expenditures of the issuer are being made only in accordance with authorizations of management and directors of the issuer; and |
|--------|-----|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | (3) | Provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of the issuer’s assets that could have a material effect on the financial statements of the issuer. |
|--------|-----|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

|   | · | In the second quarter, the Partnership developed and implemented a plan to improve controls over certain key financial statement spreadsheets that support all significant balance sheet and income statement accounts.  The Partnership also created and documented a procedural framework to ensure the completeness and accuracy of the Partnership’s derivative activities.  Additionally, the Partnership has completed the development of a revised financial close and reporting narrative that adequately describes the process, identifies key controls and assesses segregation of duties. |
|--------|--------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

|   | · | In the third quarter, the Partnership developed documentation that describes the business processes and identifies key controls for internal control over financial reporting that assisted the Managing General Partner in adequately assessing internal control over financial reporting for the Partnership.  In addition, the Partnership developed documentation and procedures to adequately assess segregation of duties.  The controls and procedures were tested prior to December 31, 2009.  At present, the Partnership has not quantified the total cost of this initiative; however, the majority of this cost is expected to be paid by the Managing General Partner. |
|--------|--------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

|   | · | Effective July 1, 2009, as part of PDC’s broader financial reporting system, PDC implemented a new partnership investor distribution accounting module replacing the existing accounting software.  PDC has taken the necessary steps to monitor and maintain appropriate internal controls during this period of change.  These steps included procedures to preserve the integrity of the data converted and a review by the business owners to validate data converted.  Additionally, PDC provided training related to the business process changes and the financial reporting system software to individuals using the financial reporting system to carry out their job responsibilities, as well as those who rely on the financial information.  PDC anticipates that the implementation of this module will strengthen the overall systems of internal controls due to enhanced automation and integration of related processes.  PDC is modifying the design and documentation of internal control process and procedures relating to the new module to supplement and complement existing internal control over financial reporting.  The system changes were undertaken to integrate systems and consolidate information and were not undertaken in response to any actual or perceived deficiencies in PDC’s internal control over financial reporting.  Testing of the controls related to these new systems was included in the scope of PDC’s assessment of its internal control over financial reporting as of December 31, 2009. |
|--------|--------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|

----

| Item 15. | Exhibits, Financial Statement Schedules |
|----------|-----------------------------------------|

| (a) | Exhibits index. |
|-----|-----------------|

|                 |   |                                                                                                                                                                                                                                                   |   | Incorporated by Reference |   |            |
|----------------------|--------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|---------------------------|--------|-----------------|
|  Exhibit Number |   | Exhibit Description                                                                                                                                                                                                                                    |   | Form                      |   | SEC File Number |   | Exhibit |   |   Filing Date |   |   Filed Herewith |
|                 |   |                                                                                                                                                                                                                                                   |   |                      |   |            |   |   |   |   |   |   |
| 31.1                 |   | Rule 13a-14(a)/15d-14(c) Certification of Chief Executive Officer of Petroleum Development Corporation (dba PDC Energy), the Managing General Partner of the Partnership.                                                                              |   |                      |   |            |   |   |   |   |   | X |
|                 |   |                                                                                                                                                                                                                                                   |   |                      |   |            |   |   |   |   |   |   |
| 31.2                 |   | Rule 13a-14(a)/15d-14(c) Certification of Chief Financial Officer of Petroleum Development Corporation (dba PDC Energy), the Managing General Partner of the Partnership.                                                                              |   |                      |   |            |   |   |   |   |   | X |
|                 |   |                                                                                                                                                                                                                                                   |   |                      |   |            |   |   |   |   |   |   |
| 32.1                 |   | Title 18 U.S.C. Section 1350 (Section 906 of Sarbanes-Oxley Act of 2002) Certifications by Chief Executive Officer and Chief Financial Officer of Petroleum Development Corporation (dba PDC Energy), the Managing General Partner of the Partnership. |   |                      |   |            |   |   |   |   |   | X |
|                 |   |                                                                                                                                                                                                                                                   |   |                      |   |            |   |   |   |   |   |   |
| 99.2                 |   | Report of Independent Petroleum Consultants−Ryder Scott Company, L.P.                                                                                                                                                                            |   |                      |   |            |   |   |   |   |   | X |

----

| Signature                 |   | Title                                              |   | Date            |
|---------------------------|--------|----------------------------------------------------|--------|-----------------|
|                      |   |                                               |   |            |
| /s/ Richard W. McCullough |   | Chairman and Chief Executive Officer               |   | August 27, 2010 |
| Richard W. McCullough     |   | Petroleum Development Corporation (dba PDC Energy) |   |            |
|                      |   | Managing General Partner of the Registrant         |   |            |
|                      |   | (Principal executive officer)                      |   |            |
|                      |   |                                               |   |            |
| /s/ Gysle R. Shellum      |   | Chief Financial Officer                            |   | August 27, 2010 |
| Gysle R. Shellum          |   | Petroleum Development Corporation (dba PDC Energy) |   |            |
|                      |   | Managing General Partner of the Registrant         |   |            |
|                      |   | (Principal financial officer)                      |   |            |
|                      |   |                                               |   |            |
| /s/ R. Scott Meyers       |   | Chief Accounting Officer                           |   | August 27, 2010 |
| R. Scott Meyers           |   | Petroleum Development Corporation (dba PDC Energy) |   |            |
|                      |   | Managing General Partner of the Registrant         |   |            |
|                      |   | (Principal accounting officer)                     |   |            |
|                      |   |                                               |   |            |
| /s/ Kimberly Luff Wakim   |   | Director                                           |   | August 27, 2010 |
| Kimberly Luff Wakim       |   | Petroleum Development Corporation (dba PDC Energy) |   |            |
|                      |   | Managing General Partner of the Registrant         |   |            |
|                      |   |                                               |   |            |
| /s/ Anthony J. Crisafio   |   | Director                                           |   | August 27, 2010 |
| Anthony J. Crisafio       |   | Petroleum Development Corporation (dba PDC Energy) |   |            |
|                      |   | Managing General Partner of the Registrant         |   |            |
|                      |   |                                               |   |            |
| /s/ Jeffrey C. Swoveland  |   | Director                                           |   | August 27, 2010 |
| Jeffrey C. Swoveland      |   | Petroleum Development Corporation (dba PDC Energy) |   |            |
|                      |   | Managing General Partner of the Registrant         |   |            |
|                      |   |                                               |   |            |
| /s/ Joseph E. Casabona    |   | Director                                           |   | August 27, 2010 |
| Joseph E. Casabona        |   | Petroleum Development Corporation (dba PDC Energy) |   |            |
|                      |   | Managing General Partner of the Registrant         |   |            |

----